21047313

素因数分解:

$3^1\times 7^2\times {\mathrm{67}}^1\times {\mathrm{2137}}^1$

素因数の和:2221

約数の個数: 24

約数和(自身を含む): 33147552

約数和(自身を除く): 12100239

約数列:

[1, 3, 7, 21, 49, 67, 147, 201, 469, 1407, 2137, 3283, 6411, 9849, 14959, 44877, 104713, 143179, 314139, 429537, 1002253, 3006759, 7015771, 21047313]

約数ペア:

[(1, 21047313), (3, 7015771), (7, 3006759), (21, 1002253), (49, 429537), (67, 314139), (147, 143179), (201, 104713), (469, 44877), (1407, 14959), (2137, 9849), (3283, 6411)]